Reconstructing trophic geographies of chub mackerel using isotope

Stable isotope analysis of eye lenses can reconstruct the geographic and trophic histories of fish. However, it is difficult to distinguish between the two pieces of information: migration and changing trophic relationships with the conventional bulk stable isotope approach. In this study, we measured the nitrogen isotope ratios of individual amino acids in eye lenses of chub mackerel Scomber japonicus(n = 3) from the western North Pacific to test whether the two pieces of information could be distinguished.

bt.harada.2022

Format

The data frame 54 × 5 contains the following columns:

fish_id	character	fish identifier
radius	numeric	eye lens radius (mm)
fl	numeric	fork length (mm)
age	numeric	fish age (day)
d15n	numeric	d15N bulk values (permil)

Details

The dataset contains chronologies of d15N bulk values measured in eye lenses of Chub mackerel (n = 3) from the western North Pacific.

Instrument: EA-IRMS (elemental analyzer–isotope ratio mass spectrometry )

Source

Harada, Y., Ito, S. I., Ogawa, N. O., Yoshikawa, C., Ishikawa, N. F., Yoneda, M., & Ohkouchi, N. (2022). Compound-Specific Nitrogen Isotope Analysis of Amino Acids in Eye Lenses as a New Tool to Reconstruct the Geographic and Trophic Histories of Fish. Frontiers in Marine Science, 8, 2146. https://doi.org/10.3389/fmars.2021.796532

Traversing the paper's information via Semantic Scholar ID 59c01879e1713cb2380d18050ed887f1c7b19a7f using S2miner package

Author

Liuyong Ding, ly_ding@126.com

Concepts

eye lenses, stable isotope, d15N

Examples

### copy data into 'dat'
dat <- bt.harada.2022
tibble::tibble(dat)
#> # A tibble: 54 × 5
#>    fish_id radius    fl   age  d15n
#>    <chr>    <dbl> <dbl> <dbl> <dbl>
#>  1 F1        0.09   7.2   2.3   4.8
#>  2 F1        0.22  16.8   7.2   3.2
#>  3 F1        0.3   22.8  10.3   3.1
#>  4 F1        0.39  30    14.1   2.5
#>  5 F1        0.47  36.1  17.3   2.9
#>  6 F1        0.53  40.9  20     3.5
#>  7 F1        0.59  45.7  22.7   3.3
#>  8 F1        0.66  50.5  25.4   5  
#>  9 F1        0.72  55.3  28.2   3.7
#> 10 F1        0.8   61.3  31.7   5.1
#> # ℹ 44 more rows

if (FALSE) {
library(dplyr)
library(ggplot2)

### Nitrogen Isotope Analysis of Amino Acids
ggplot(data = dat, aes(radius, d15n)) +
  geom_point(aes(colour = fish_id), show.legend = F) +
  geom_line(aes(colour = fish_id), show.legend = F) +
  labs(
    x = "Eye lens radius (mm)",
    y = expression(delta * ""^15 * "N" * " (‰)")
  ) +
  theme_bw() +
  theme(
    panel.grid.major = element_blank(), panel.grid.minor = element_blank(),
    panel.background = element_blank(), axis.line = element_line(colour = "black"),
    text = element_text(size = 10), legend.title = element_blank(),
    plot.title = element_text(face = "bold")
  ) +
  scale_y_continuous(breaks = c(0, 5, 10, 15))
}